The U.S. Geological Survey (USGS), in cooperation with
the National Oceanic and Atmospheric Administration (NOAA) and the
Massachusetts Office of Coastal Zone Management (MA CZM), is producing
detailed geologic maps of the coastal sea floor. Imagery, originally
collected by NOAA for charting purposes, provides a fundamental
framework for research and management activities along this part of the
Massachusetts coastline, shows the composition and terrain of the
seabed, and provides information on sediment transport and benthic
habitat. Interpretive data layers were derived from multibeam
echo-sounder and sidescan-sonar data collected in the vicinity of Woods
Hole, a passage between the Elizabeth Islands and Cape Cod,
Massachusetts. In November 2007, bottom photographs, seismic-reflection
profiles, and surficial sediment data were acquired as part of a
ground-truth reconnaissance survey.

Public domain data are freely redistributable with proper
metadata and source attribution. Please recognize the National Oceanic
and Atmospheric Administration (NOAA) and U.S. Geological Survey (USGS)
as the originators of this information.

The multibeam data were acquired in XTF (extended
Triton data format) and recorded digitally through an ISIS data
acquisition system. A Reson 8101 echosounder hull-mounted on a 29'
launch deployed from the NOAA ship Whiting was used to acquire the
sounding data. These data were processed using CARIS HIPS (Hydrographic
Image Processing System) software for quality control, to incorporate
sound velocity and tidal corrections, and to produce a base surface at
1.5-m resolution. Sound velocity corrections were derived using
frequent SEACAT CTD (conductivity-temperature-depth) profiles.
Typically, a CTD cast was conducted every four to six hours of
multibeam acquisition. Tidal zone corrections were calculated from data
acquired at the Nantucket tidal gauge. The vertical resolution of the
multibeam data is approximately 0.5% of the water depth. The base
surface was hill shaded (sun illuminated) with the sun at an azimuth of
315, an altitude angle above the horizon of 45, a vertical exaggeration
of 5x , and color encoded by depth with a continous color pallete in
CARIS HIPS. The data were then exported in GeoTIFF (.tif) format in UTM
Zone 19, NAD83.

Process_Date: Unknown

Source_Produced_Citation_Abbreviation:
h11077_mb1.5m_utm19.tif

Process_Contact:

Contact_Information:

Contact_Organization_Primary:

Contact_Organization: National
Oceanic and Atmospheric Administration

Contact_Person: Rick Brennan

Contact_Address:

Address_Type: mailing address

Address: 1315 East West Highway

City: Silver Spring

State_or_Province: MD

Postal_Code: 20910

Country: USA

Contact_Voice_Telephone:
301-713-2653 x152

Contact_Electronic_Mail_Address:
richard.t.brennan@noaa.gov

Spatial_Data_Organization_Information:

Direct_Spatial_Reference_Method: Raster

Raster_Object_Information:

Raster_Object_Type: Pixel

Row_Count: 1688

Column_Count: 1525

Vertical_Count: 1

Spatial_Reference_Information:

Horizontal_Coordinate_System_Definition:

Planar:

Grid_Coordinate_System:

Grid_Coordinate_System_Name: Universal
Transverse Mercator

Universal_Transverse_Mercator:

UTM_Zone_Number: 19

Transverse_Mercator:

Scale_Factor_at_Central_Meridian:
0.999600

Longitude_of_Central_Meridian:
-69.000000

Latitude_of_Projection_Origin:
0.000000

False_Easting: 500000.000000

False_Northing: 0.000000

Planar_Coordinate_Information:

Planar_Coordinate_Encoding_Method: row
and column

Coordinate_Representation:

Abscissa_Resolution: 1.500984

Ordinate_Resolution: 1.500889

Planar_Distance_Units: meters

Geodetic_Model:

Horizontal_Datum_Name: North American Datum
of 1983

Ellipsoid_Name: Geodetic Reference System 80

Semi-major_Axis: 6378137.000000

Denominator_of_Flattening_Ratio: 298.257222

Entity_and_Attribute_Information:

Overview_Description:

Entity_and_Attribute_Overview:

There are no attributes associated with the GeoTIFF
image. Pixel values convey RGB values of individual cells.

Distribution_Information:

Distributor:

Contact_Information:

Contact_Organization_Primary:

Contact_Organization: U.S. Geological
Survey

Contact_Person: Larry Poppe

Contact_Position: Geologist

Contact_Address:

Address_Type: mailing and physical
address

Address: 384 Woods Hole Road

City: Woods Hole

State_or_Province: MA

Postal_Code: 02543-1598

Country: USA

Contact_Voice_Telephone: (508) 548-8700 x2314

Contact_Facsimile_Telephone: (508) 457-2310

Contact_Electronic_Mail_Address:
lpoppe@usgs.gov

Resource_Description: Downloadable Data

Distribution_Liability:

This dataset has been approved for release and publication by
the USGS. Although it has been subjected to rigorous review and is
substantially complete, the USGS reserves the right to revise the data
pursuant to further analysis and review. Furthermore, it is released on
condition that neither the U.S. Government, the Department of the
Interior, nor the USGS, nor any of their employees, contractors, or
subcontractors, make any warranty, express or implied, nor assume any
legal liability or responsibility for the accuracy, completeness, or
usefulness of any information, apparatus, product, or process
disclosed, nor represent that its use would not infringe on privately
owned rights.

Any use of trade, product, or firm names is for descriptive
purposes only and does not imply endorsement by the U.S. Government.

Access_Instructions: Data are
downloadable via the World Wide Web (WWW).

Offline_Option:

Offline_Media: DVD-ROM

Recording_Capacity:

Recording_Density: 4.75

Recording_Density_Units: Gbytes

Recording_Format: UDF

Fees: None

Technical_Prerequisites:

This image is available as a GeoTIFF image with an
accompanying world file. To utilize this data, the user must have an
image viewer, image processing or GIS software package capable of
importing a GeoTIFF image.